.title {
    width: 100%;
    font-size: 38px;
    font-weight: 600;
    height: 120px;
    line-height: 120px;
    color: white;
    text-align: center;
    letter-spacing: 2px;
}
.header {
    width: 100%;
    background-color: #409EFF;

}
.operation {
    color: #409EFF;
    cursor: pointer;
}
.operation:hover {
    text-decoration: underline;
}
.form {
    width: 100%;
    height: 100%;
    background-color: rgba(127,127,127,0.6);
    position: absolute;
    left: 0;
    top: 0;
    z-index: 100;
}
.form-box{
    width: 500px;
    height: 380px;
    padding-top: 30px;
    margin-left: calc(50% - 250px);
    margin-top: 80px;
    background-color:rgb(255,255,255);
    border: 1px solid #d8d5c4;
    border-radius: 4px;
}